Simple Facebook Themed Gateway Need URGENT

I need a fb themed box that will overlay any content on the app page and look like a popup from facebook. Here is an example- [login to view URL] All the texts needs to be editable in the script. The links displayed needs to be based off of the geolocation of the user. You can just show me how to add countries when I need them. I also need a variable at the top of the script that i can assign. I need to be able to place that variable in the links. This is urgent. Need it within a few hours. By 10pm est. I dont need a fancy backend. I know basic coding.